Attachment for multiple drills.



W. R. FOX.

ATTACHMENT FOR MULUPLE Dams.

. APPLicATioN min DEc.2. 1915. 1,210,450. Patented Jan. 2,191?.

2 SHEETS-SMU r mvmzm# WiZZcma Trims w. R. Fox, ATTACHMENT FOR MULTIPLE DRILLS BEST AVAILAL cop` a. 'unrrnnisra'rns rarnnr eser.

To all 207mm if may Concern.: j

'Be it known that I citizen of' the United tai'nnew and usefulImprovements. in At'.

ments in multiple'drills.and pertainsinoref particularly ,to an n nfnoved` attachment for The invention has 'lor'.its principal objet the provision of Vmeans which enable av multiple drill of the type above referredl to, to' be used successfully for a greater variety of work. v I j y v ln operatingrmultiple drills'fit isessen'- `vtial that the drilling` spindles shallbe placed in such relation to the work that they will drill lioles'in the work in the exact position required`,` and in. order t0 accomplish thisitr: y y

ldflthin the upper 'part of this head a num-f.

hasbeen lcustomary to hold Vthe Idrill ina" spindle` which is carriec bygan' arm, the

spindle having a vertical` adjustment, the'-l arrn. benigadjusted on thelunderside oi a round 'or rectangular head constructed i'or the purpose of carrying' the drill holding arm. ln some casesthe nature oi' the work is such vthat it is necessary to place more spindles within the rectangle than could be carriedby' 'the armswhich extend to the outside." 'lt Was torineet these requirements l that the present invention was designed and it consists essentially of a removable plate,

' which will hereinafter be 'referred to as a cluste1". plate, adapted to be attached. to the underside of the drill head,v :to which the several drills are attached in any desired manner. This cluster plate is prei"-v erab'ly rectangular in forni to fit the underside of the drill head andis provided withV` holes which are arranged according tothe position in which it is desiredvtohavethe spindles located. The spindles y'pass through these holes and are adapted to lit the holesk closelyfor to have adjustable bearings-pro- -vided therein as thecase Inay'be. In either case a short arm is attachedto theunderside ofthe cluster plate, adjustably or other-f Wise and the spindle is supported thereby.

With these and other objects, the 4inven-l tionv consists in the` combination 'and rangement of parte more fully describecltin `A .ipiiaiion flied December 2, mit. isemina..entre.

l y j Sta-tes. residing at.y Gund Ra nds Michivan `hare invented cer,` 7 t: 7 i

' ATTACHMENT ron'irunirrnnartns.

l Y "f the' following specilication9 illustrated in the WmLmM R. lio-X,

- 'Imaginationbf-Leaers'rneng-f Errenteria-lait.

accoinpanying drawings7 and more particui equipped,withzone embodiment or" the pres. entgginvention 1 Fig. is a plan@ viewci a. r cluster plate showing one scheine by 'which the' drillsniay be arranged thereon. Fig.

is ay vertical section through a portion oi the clusterv plate, showing'l one manner in which drillsgnnayibe attached thereto; Fig. 4 1s a similar: View vshowing a different ar rangement, and Eig. 5 is a top plan `View of f one or' the supporting brackets. Fig. 6 yis a bottoni'splan 'View of a supportingv bracket shown inl? 1g. Fig. if' is a `.fiew similar to Fig. showings. detail of a. modification. v

Fig. S is .a sectional detail through one of the holes yin the cluster plate.

Referring tothe drawings the upper head l of arniult'iple drill is shown. in Fig. l.

berief vertically disposed driving' Ispindles j 2 are arranged, being driven by suitable gearing located yat 'their upper ends. l.To the lower endsof these driving spindles .2 are attached the drill spindles 3 (here shown projectingvr below the lower surface of they head l.)' The' drill spindles lniay be di*v and nuts T. *The enact design or scheme for the arrangement of the drill spindles in the cluster plates7V not n'iaterialand maybe varied to suit the particular requirements the work to be done. In any event, howexer,

the cluster plate perforated with nuinber of holesS through which the upperendsl of the-drill spindles 3 project into `the upper gear spindle box portion-of the head 1.

- In ythe l`detail'section shown in Fig. 3 a

supporting arm 9 is secured to the underside `the hole 8 to form suitable adjustable 1 bea-ring` for the 4drill spindle 3. This bracket arm 9 consistso a horizontally dispfosfed portion lO'which may bel slotted as at ll'for the purpose o adjusting its position on? the. cluster plate. by means of the bolt and nut l2 and 13, respectively, with which is roo 'of the cluster plate 5 in proper relation to clamped in place. If it is not desired to vary the adjustment of the bracket arm 9, (Figs. Jr and 6) it may be provided with a web piece 1i, integral with the upper horizontal portion lll, havingdowel pins 15 adapted to register with\ holes 16 in the cluster plate. The other part of the bracket arm 9 comprises a vertical portion lOa channeled as at 1.0" and having a horizontally disposed opening l0 therethrough. A clamping piece I7 forming a bearing around the spindle 3 is provided having a dovetailed groove IS formed vertically therein. A bolt 19 with its head in the groove 18 projects through the transverse channel. l()al of the bracket 9 and has a nut 2l threaded on its outer end. By these means the relative position ot' the spindle .may be adjusted vertically and laterally #within the limits of the diameter of the hole 8 of the cluster plate 5.

' Fig. l shows a modified form of bracket arm 9 providing a bearing for the drill spindle 3 without any vertical orlateral adjusting features and with the member lO spindles according to the old form by use of adjustable side arms. It is to be lunderstood that the present invention is not rintended to be limited to any precise scheme of placing the spindle holes 8 in the cluster plate, and that the system of perforations may be varied at Will withoutfdeparting from the spirit of the invention.

In practice a multiple drill, such as is here described, is used when a large number of holes are to be formed in a piece of work and further in order to operate a drill of this character economically there must be a large number of pieces of the same character to be drilled. It' however, the supply of work should be comparatively small there would be frequent occasion to vary the position and adjustment of the several' drill spindles. In an ordinary drill this is'done by shifting the arms to different positions, which requires considerable time as each arm must be located accurately so that the drill will enter the jig bushing in proper alinement. By use of the present cluster plate these diiliculties are overcome, so that a considerable saving of time andwork-is accomplished.

From the foregoing description it will be seen that the cluster plate can be used in different ways; for esan'ij'ilc where it is desirable to detach the arms 9 from the plate 5,"v

BEST AVAlLABLE GQ93210311 the arms are either doweled on the plate, as in Fig. 4, or the plate is accurately bored to receive the spindle bearing, as in Fig. 7, in which case the arms can be removed from the plate and can be quickly and accurately replaced at any time. Hence with the construction shown in Fig. 3 it is frequently desired in practice, where a great many pieces of work of the same scheme of marking are to be operated upon, to leave the arms in one osition. When the Work is changed the c uster plate can be quickly detached from the head without disturbing the position of the several brackets or arms. Universal slip socket joints at the upper end of the several drill spindles permit of this quick detachment of the parts.

The difference between the construction shown in Fig'. 7 and that shown in Fig. 4, is that the large hole injFig. 4 can be bored at an approximate position and after all' the arms are set and the work has been drilled the plate can be taken off and turned bottom upward and the dowel ins put in, which will insure a quick setting for two operations.

Having thus described my invention, what I claim is:

l. In combination with a multiple drill, having a spindle supporting head, a removable cluster plate secured thereto, and a plurality of drill spindles carried by said plate. l

2. In combination with a multiple drill, having a spindle supporting head, a cluster plate :detachably secured to the underside thereof,l and a plurality of drill spindles carried by said plate. A

3. In combination with a multi le drill, havin" a spindle supporting hea a lrectangular cluster plate, detachably secured to the underside of said head, means on said plate affording bearings for the spindles and a plurality of drill spindles carried .by

said means. 4. uIn combination with a multiple drill havin a spindle supportingr head, a rectang r perforated plate dctachably secured"i lle undjerside of .said head, a plurality drill'fspindles projecting up througl'the perforations in said plate, and adjustable bearingr brackets attached t0 said plate and su porting said d s indles.

5. In com ination with atmu tiple drill havin a spindle supportin jphnd, a rect'anguIar perforated cluster p #te dctachably secured to the underside of sai head, a plurality of drill spindles, and a plurality of supporting brac ets secured lo said cluster. plates and supporting said drill. spindles, said brackets being provided `.with means for varying the longitudinal adjustim-nt of the spindles and also the lateraladjustment of same Within the limits of the yperforations through which the spindles pass.'

G. n combination with a mutple drill, able cluster plate secux'ed thereto and a. plu- -havng a spindle-'supporting head, a remov'- mty of drill spindles detachably carried.

able `cluster plate secured themto and a, pluby said pate.

'aljy of drl spindles carried bysad plate vWILLIAB- R. FOX. and femovuble therewith. Witnesses;

l?. n combination with L muliple drill. MHA JONES,

having a Spnde, @appel-ting head, a rmw 'FLORENCE GERMAN. 

